During an interview with CBS News on Sunday, Ryan defended his Medicare proposal.

“My mom is a Medicare senior in Florida,” Ryan said. “Our point is we need to preserve their benefits, because government made promises to them that they’ve organized their retirements around. In order to make sure we can do that, you must reform it for those of us who are younger.”

Here is a video of a portion of Romney’s speech:

Mitt Romney now moves on to Miami for an afternoon campaign event with Senator Marco Rubio.